Range from the cheapest EICR Landlord Certificate £129 (Masterfix electrical based in EN5) to the dearest EICR Landlord Certificate £300 (Wojciech Myk based in N12).
Comparing electricians estimates for completing an EICR test in your home gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes by posting your job to electricians in N20

"Need EICR Landlord Certificate - EN5
"EICR test. 5 Bedrooms, 1 Consumer Unit, 12 Circuits - N11